I haven't paid much attention to webOS, but I heard it was trying to be 'web developer friendly' -- meaning 'web standards' like HTML 5 I thought.
I was pleasantly surprised to find the following :
https://developer.palm.com/content/index.php?id=4012
Roll your own services with Node.js
The popular Node.js runtime environment is built into webOS 2.1, which means that you can now develop not just webOS apps but also services in JavaScript.
This to me is very interesting and indicates HP (Palm) may have done webOS right.
I've been interested in server-side JavaScript (Rhino, Jaxer, POW -- Plain Old Webserver) for quite a while, but none of them seemed to have the traction to get me excited.
Now Node.js seems to be getting a lot of warranted attention. This may be the excuse I need to get a (hopefully discounted) HP Touchpad.